<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script>
    var a = ['hello','world'];
    var b = ['wo',1]
    var c = a.concat(b)
    document.write(c+"<br>")
    console.log(c)

    var d = ['10','b','c','d','a','e']
    document.write(d.sort())
</script>
</html>